It should be, but if the teacher is teaching you multiplication and you are struggling because you haven't reviewed addition in a while, the teacher will probab

It should be, but if the teacher is teaching you multiplication and you are struggling because you haven't reviewed addition in a while, the teacher will probably just yell at you. Only the most dedicated of teachers will review addition with you yet again before moving on with multiplication lessons. After all, there are dozens of kids in the class, they can't all delay the lesson just for your sake.